THE HONG KONG GOVERNMENT GAZETTE, MARCH 27, 1931. 167
(h) to understand the construction of centrifugal, bucket, and force pumps, the principles on which they act, and the general requirements concerning bilge and ballast pumping systems :
(i) to understand the construction and working of steering-engines and gears, electric light engines and dynamos, electric motors, refrigerating machinery, hydraulic machinery, and such internal combustion engines as are used to drive ships' launches, emergency and auxiliary machinery on board ship:
() to be able to apply the indicator, calculate the mean pressure and horse- power, and understand, generally, the fluctuation of pressure in the cylinder as shown by the diagrams obtained:
(k) to have a fair knowledge of the rudiments of projection, and be able to make a dimensioned working drawing of some simple part of the machinery with which he ought to be familiar, or to complete and develop a given example:
(7) the methods of constructing marine steam engines and boilers, as used in the workshops, the processes to which the several parts are submitted, or which are incidental to their manufacture; and the methods employed in fitting the machinery on board ship:
(m) the various designs of paddle and screw steam engines (including turbines) now adopted; the functions of each important part; and the attention required by the different parts of the machinery on board ship:
(n) the methods of testing and altering the setting of the slide valves; and the effect produced in the working of the engines by definite alteration of the valves' setting:
(o) the construction and working of evaporators, feed heaters and feed filters: (p) marine boilers of various modern designs; and mauner of staying them, and
also of preventing their movement when the vessels in which they are fitted are rolling heavily, etc; the determination, by calculation, of a suitable working pressure for a boiler of given dimensions:
(q) the use and management of boiler fittings and mountings, with special reference to the water gauges and safety valves; the precautions necessary to be taken when raising steam, and when opening stop valves to admit s'eam to steam pipes, etc.:
(r) the installations generally employed, respectively, for forcing draught, superheating steam, and burning oil fuel; the attention they require when working, and the care necessary for their maintenance in satis- factory condition.
31. First Class Engineer.-A candidate for a First Class Engineer's Certificate, (Ordinary), must not be less than 221⁄2 years of age.
Sea Service. The candidate must
(a) have served at sea in foreign-going vessels for eighteen months, on regular watch on the main propelling machinery, as Senior Engineer in charge. of the whole watch (see rule 39); or
(b) have served at sea in the home trade for 2 years and 3 mouths as First Engineer; or 3 years as Second Engineer; or 3 years and 9 months as Third or Fourth Engineer, being Senior Engineer in charge of the whole watch on the main propelling machinery; or
Subject to the provisions of rules 33 and 34, the whole of the required period of qualifying service must have been performed while in possession of a Second Class Certificate (Ordinary or Motor) as that for which the candidate wishes to be examined; and it must have been performed in steamships of not less than 90 nominal horsepower and/or motor ships of not less than 560 brake horsepower. At least two-thirds of the required service must have been in ships of the type (steam or motor) to which the desired certificate relates; the remainder of the service may have been in either steam or motor ships.